Abstract: In order to more effectively to evaluate the 2093 coal mining face in Linhua mine,on the basis of impact assessment factors (geological structure and coal seam gas parameters,coal body structure characteristics and the conditions of coal seam gas occurrence factors),establishing the coal mining face of evaluation of sudden extinction index system and using the fuzzy comprehensive evaluation method to evaluate the 2093 coal mining face.This method has been proved to be accurate,reliable and satisfied through field practice.